Atmospheric oxygenation driven by unsteady growth of the continental sedimentary reservoir
Sign Up to like & getrecommendations! Published in 2017 at "Earth and Planetary Science Letters"
DOI: 10.1016/j.epsl.2016.12.012
Abstract: Abstract Atmospheric oxygen concentration has increased over Earth history, from ∼0 before 2.5 billion years ago to its present-day concentration of 21%. The initial rise in pO2 approximately 2.3 billion years ago required oxygenic photosynthesis,… read more here.
Keywords: atmospheric oxygen; oxygenation; oxygenation driven; atmospheric oxygenation ... See more keywords
Excellent Catalytic Performances of a Au/C–CuO Binary System in the Selective Oxidation of Benzylamines to Imines under Atmospheric Oxygen
Sign Up to like & getrecommendations! Published in 2021 at "ACS Omega"
DOI: 10.1021/acsomega.1c04046
Abstract: A green method of the oxidation of benzylamines to imines was developed using a novel binary system of Au/C–CuO. This system was evaluated under atmospheric oxygen, and the corresponding imines were obtained in up to… read more here.
Keywords: oxidation; system; oxidation benzylamines; binary system ... See more keywords
Equilibrium Fractionation of Oxygen Isotopes in the U3O8–Atmospheric Oxygen System
Sign Up to like & getrecommendations! Published in 2022 at "ACS Omega"
DOI: 10.1021/acsomega.2c06148
Abstract: As a major component in the nuclear fuel cycle, octoxide uranium is subjected to intensive nuclear forensics research. Scientific efforts have been mainly dedicated to determine signatures, allowing for clear and distinct attribution. The oxygen… read more here.
Keywords: system; oxygen isotopes; fractionation oxygen; oxygen ... See more keywords
Atmospheric oxygen regulation at low Proterozoic levels by incomplete oxidative weathering of sedimentary organic carbon
Sign Up to like & getrecommendations! Published in 2017 at "Nature Communications"
DOI: 10.1038/ncomms14379
Abstract: It is unclear why atmospheric oxygen remained trapped at low levels for more than 1.5 billion years following the Paleoproterozoic Great Oxidation Event. Here, we use models for erosion, weathering and biogeochemical cycling to show… read more here.
Keywords: carbon; atmospheric oxygen; oxidative weathering; organic carbon ... See more keywords
Phosphorus-limited conditions in the early Neoproterozoic ocean maintained low levels of atmospheric oxygen
Sign Up to like & getrecommendations! Published in 2020 at "Nature Geoscience"
DOI: 10.1038/s41561-020-0548-7
Abstract: The redox chemistry of anoxic continental margin settings evolved from widespread sulfide-containing (euxinic) conditions to a global ferruginous (iron-containing) state in the early Neoproterozoic era (from ~1 to 0.8 billion years ago). Ocean redox chemistry… read more here.
Keywords: ocean; atmospheric oxygen; limited conditions; chemistry ... See more keywords
Global atmospheric oxygen variations recorded by Th/U systematics of igneous rocks
Sign Up to like & getrecommendations! Published in 2019 at "Proceedings of the National Academy of Sciences of the United States of America"
DOI: 10.1073/pnas.1902833116
Abstract: Significance Scientists have been working on the dating of atmospheric oxygenation in Earth’s history for decades. However, most previous studies relied on evidence from sedimentary rocks. Here, we show that igneous rocks can also be… read more here.
Keywords: arc igneous; atmospheric oxygen; oxygenation; igneous rocks ... See more keywords
Extreme variability in atmospheric oxygen levels in the late Precambrian
Sign Up to like & getrecommendations! Published in 2022 at "Science Advances"
DOI: 10.1126/sciadv.abm8191
Abstract: Mapping the history of atmospheric O2 during the late Precambrian is vital for evaluating potential links to animal evolution. Ancient O2 levels are often inferred from geochemical analyses of marine sediments, leading to the assumption… read more here.
Keywords: late precambrian; oxygen levels; variability atmospheric; extreme variability ... See more keywords
The strange history of atmospheric oxygen
Sign Up to like & getrecommendations! Published in 2022 at "Physiological Reports"
DOI: 10.14814/phy2.15214
Abstract: Many of us think a lot about oxygen. This includes how the normal body handles oxygen in health, but particularly how this is complicated by lung disease. Few of us are aware that as human… read more here.
Keywords: strange history; history atmospheric; atmospheric oxygen; oxygen ... See more keywords
Mars: Life, Subglacial Oceans, Abiogenic Photosynthesis, Seasonal Increases and Replenishment of Atmospheric Oxygen
Sign Up to like & getrecommendations! Published in 2020 at "Open Astronomy"
DOI: 10.1515/astro-2020-0020
Abstract: Abstract The discovery and subsequent investigations of atmospheric oxygen on Mars are reviewed. Free oxygen is a biomarker produced by photosynthesizing organisms. Oxygen is reactive and on Mars may be destroyed in 10 years and… read more here.
Keywords: oxygen; abiogenic photosynthesis; atmospheric oxygen; oxygen mars ... See more keywords
The Influence of Atmospheric Oxygen Content on the Mechanical Properties of Selectively Laser Melted AlSi10Mg TPMS-Based Lattice
Sign Up to like & getrecommendations! Published in 2023 at "Materials"
DOI: 10.3390/ma16010430
Abstract: Selective Laser Melting (SLM) is an emerging Additive Manufacturing (AM) technique for the on-demand fabrication of metal parts. The mechanical properties of Selectively Laser Melted (SLMed) parts are sensitive to oxygen concentration within the SLM… read more here.
Keywords: influence; oxygen content; oxygen; mechanical properties ... See more keywords
In situ observation of atmospheric oxygen and carbon dioxide in the North Pacific using a cargo ship
Sign Up to like & getrecommendations! Published in 2018 at "Atmospheric Chemistry and Physics"
DOI: 10.5194/acp-18-9283-2018
Abstract: Abstract. Atmospheric oxygen ( O2 ) and carbon dioxide ( CO2 ) variations in the North Pacific were measured aboard a cargo ship, the New Century 2 (NC2), while it cruised between Japan and the… read more here.
Keywords: situ observation; oxygen carbon; north pacific; atmospheric oxygen ... See more keywords